6 weeks pregnant and miscarrying

I'm six weeks pregnant and my doctor has just told me I seem to be miscarrying after an early scan, but I've had a blood test today and another is happening on Sunday to check that it is right, I'm really sad about it because I was thinking in my head about a little family and how this baby and my 9 month old will be so close and it'd be lovely but what's the miscarrying process because I'm not entirely clued up on it how long does it take will there be bleeding etc? Thankyou in advance 😔